I have a motorola v550 cellphone with a locked sim card. how do i unlock it via usb

Hi data cable is not safe to unlock your motorola v550. Because some times your mobile may get damaged. So better you can use unlock code. It is the best and safe method to unlock your mobile. If you need unlock code you can visit this site Prounlocking.com here you can get the code and unlock your motorola v550 easily. To get the code you have to mention which country is locked now,network provider and imei number. Then they send unlock code through email.